The dark grey bell is a 1-year only (1968) cast iron bell housing that I have listed separately on here for $450 due to it's rarity. It is casting number:2843887 The other 2 are aluminum bells. One is being offered with the transmission package and the other I want to keep for my project. But, if the transmission package sells without the bell, I would then offer it for sale at $250. The casting number on it is: 3515734